Electric toothbrush



FIG. 1 is a front right perspective view of an electric toothbrush according to the new design;

FIG. 2 is a rear left perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a right side view thereof, the left side view being a mirror image of the same;

FIG. 5 is a left side view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

All broken lines shown in the drawings are for environmental purposes only and form no part of the claimed design. 

CLAIM The ornamental design for an electric toothbrush, as shown and described. 